body {
  font-family: Helvetica, 'microsoft yahei', Arial, sans-serif;
  font-size: 14px;
  line-height: 1.6;
  padding: 20px;
  color: #4e443c;
  background: #fff;
  width: 940px;
  margin: 0 auto;
}

body *:first-child {
  margin-top: 0 !important;
}

body *:last-child {
  margin-bottom: 0 !important;
}

a {
  color: #4183C4;
  text-decoration: none;
}

a.absent {
  color: #cc0000;
}

a.anchor {
  display: block;
  padding-left: 30px;
  margin-left: -30px;
  cursor: pointer;
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
}

h1, h2, h3, h4, h5, h6 {
  margin: 20px 0 10px;
  padding: 0;
  font-weight: bold;
  -webkit-font-smoothing: antialiased;
  cursor: text;
  position: relative;
}

h2:first-child, h1:first-child, h1:first-child + h2, h3:first-child, h4:first-child, h5:first-child, h6:first-child {
  margin-top: 0;
  padding-top: 0;
}

h1:hover a.anchor, h2:hover a.anchor, h3:hover a.anchor, h4:hover a.anchor, h5:hover a.anchor, h6:hover a.anchor {
  text-decoration: none;
}

h1 tt, h1 code {
  font-size: inherit;
}

h2 tt, h2 code {
  font-size: inherit;
}

h3 tt, h3 code {
  font-size: inherit;
}

h4 tt, h4 code {
  font-size: inherit;
}

h5 tt, h5 code {
  font-size: inherit;
}

h6 tt, h6 code {
  font-size: inherit;
}

h1 {
  font-size: 28px;
  color: black;
}

h2 {
  font-size: 24px;
  border-bottom: 1px solid #cccccc;
  color: black;
}

h3 {
  font-size: 18px;
}

h4 {
  font-size: 16px;
}

h5 {
  font-size: 14px;
}

h6 {
  color: #777777;
  font-size: 14px;
}

p, blockquote, ul, ol, dl, li, table, pre {
  margin: 15px 0;
}

hr {
  background: transparent url("/assets/md-hr.png") repeat-x 0 0;
  border: 0 none;
  color: #cccccc;
  height: 4px;
  padding: 0;
}

h2:first-child {
  margin-top: 0;
  padding-top: 0;
}

h1:first-child {
  margin-top: 0;
  padding-top: 0;
}

h1:first-child + h2 {
  margin-top: 0;
  padding-top: 0;
}

h3:first-child, h4:first-child, h5:first-child, h6:first-child {
  margin-top: 0;
  padding-top: 0;
}

a:first-child h1, a:first-child h2, a:first-child h3, a:first-child h4, a:first-child h5, a:first-child h6 {
  margin-top: 0;
  padding-top: 0;
}

h1 p, h2 p, h3 p, h4 p, h5 p, h6 p {
  margin-top: 0;
}

li p.first {
  display: inline-block;
}

ul, ol {
  padding-left: 30px;
}

ul :first-child, ol :first-child {
  margin-top: 0;
}

ul :last-child, ol :last-child {
  margin-bottom: 0;
}

dl {
  padding: 0;
}

dl dt {
  font-size: 14px;
  font-weight: bold;
  font-style: italic;
  padding: 0;
  margin: 15px 0 5px;
}

dl dt:first-child {
  padding: 0;
}

dl dt > :first-child {
  margin-top: 0;
}

dl dt > :last-child {
  margin-bottom: 0;
}

dl dd {
  margin: 0 0 15px;
  padding: 0 15px;
}

dl dd > :first-child {
  margin-top: 0;
}

dl dd > :last-child {
  margin-bottom: 0;
}

blockquote {
  border-left: 4px solid #dddddd;
  padding: 0 15px;
  color: #777777;
}

blockquote > :first-child {
  margin-top: 0;
}

blockquote > :last-child {
  margin-bottom: 0;
}

table {
  padding: 0;
  width: auto;
}
table tr {
  border-top: 1px solid #dddddd;
  background-color: white;
  margin: 0;
  padding: 0;
}

table tr:nth-child(odd) {
  background-color: #f8f8f8;
}

table tr th {
  font-weight: bold;
  border: 1px solid #dddddd;
  text-align: left;
  margin: 0;
  padding: 6px 13px;
}

table tr td {
  border: 1px solid #dddddd;
  text-align: left;
  margin: 0;
  padding: 6px 13px;
}

table tr th :first-child, table tr td :first-child {
  margin-top: 0;
}

table tr th :last-child, table tr td :last-child {
  margin-bottom: 0;
}

img {
  max-width: 100%;
}

span.frame {
  display: block;
  overflow: hidden;
}

span.frame > span {
  border: 1px solid #dddddd;
  display: block;
  float: left;
  overflow: hidden;
  margin: 13px 0 0;
  padding: 7px;
  width: auto;
}

span.frame span img {
  display: block;
  float: left;
}

span.frame span span {
  clear: both;
  color: #333333;
  display: block;
  padding: 5px 0 0;
}

span.align-center {
  display: block;
  overflow: hidden;
  clear: both;
}

span.align-center > span {
  display: block;
  overflow: hidden;
  margin: 13px auto 0;
  text-align: center;
}

span.align-center span img {
  margin: 0 auto;
  text-align: center;
}

span.align-right {
  display: block;
  overflow: hidden;
  clear: both;
}

span.align-right > span {
  display: block;
  overflow: hidden;
  margin: 13px 0 0;
  text-align: right;
}

span.align-right span img {
  margin: 0;
  text-align: right;
}

span.float-left {
  display: block;
  margin-right: 13px;
  overflow: hidden;
  float: left;
}

span.float-left span {
  margin: 13px 0 0;
}

span.float-right {
  display: block;
  margin-left: 13px;
  overflow: hidden;
  float: right;
}

span.float-right > span {
  display: block;
  overflow: hidden;
  margin: 13px auto 0;
  text-align: right;
}

code, tt {
  margin: 0 2px;
  padding: 0 5px;
  white-space: nowrap;
  border: 1px solid #eaeaea;
  background-color: #f8f8f8;
  border-radius: 3px;
}

pre code {
  margin: 0;
  padding: 0;
  white-space: pre;
  border: none;
  background: transparent;
}

.highlight pre {
  background-color: #f8f8f8;
  border: 1px solid #cccccc;
  font-size: 13px;
  line-height: 19px;
  overflow: auto;
  padding: 6px 10px;
  border-radius: 4px;
}

pre {
  background-color: #f8f8f8;
  border: 1px solid #cccccc;
  font-size: 13px;
  line-height: 19px;
  overflow: auto;
  padding: 6px 10px;
  border-radius: 4px;
}

pre code, pre tt {
  background-color: transparent;
  border: none;
}

ol.book_toc {
  margin: 30px 36px;
  list-style: none;
  background: #f1f1f1;
}

ol.book-toc h2 {
  color: #4e443c;
}

.chapter {
  margin-bottom: 0.6em;
}

ol.chapter_toc {
  list-style: none;
  background: #eee;
  padding: 5px 30px;
  -moz-border-radius: 3px;
  -webkit-border-radius: 3px;
  -o-border-radius: 3px;
  -ms-border-radius: 3px;
  -khtml-border-radius: 3px;
  border-radius: 3px;
}

ol.chapter_toc li {
  margin: 5px 0;
}

ol.book_toc ol.chapter_toc {
  background: transparent;
  margin: 0;
}

.chapter h2 {
  border: none;
  margin-bottom: 0;
}

.chapter h2 a {
  font-weight: bold;
}

#book-chapters {
  position: relative;
  background-color: #ebe9e1;
  background-color: rgba(223,221,213,0.33);
  -webkit-border-radius: 3px;
  -moz-border-radius: 3px;
  -ms-border-radius: 3px;
  -o-border-radius: 3px;
  border-radius: 3px;
  padding: 8px 12px 6px 12px;
  margin-bottom: 10px;
  font-size: 13px;
  font-weight: bold;
  text-align: center;
}
#book-chapters a {
  font-size: 13px;
}

#book-chapters .chapter_toc a {
  font-weight: normal;
}

#book-chapters ol {
  list-style: none;
  padding-left: 10px;
}

#book-chapters #chapters-dropdown {
  padding: 12px;
  top: 30px;
  text-align: left;
}

#book-chapters #chapters-dropdown ol.chapter_toc {
  background: #fff;
  padding: 0 0 0 20px;
  margin: 0;
}

#book-chapters .dropdown-panel .three-column .column-left, #book-chapters .dropdown-panel .three-column .column-middle, #book-chapters .dropdown-panel .three-column .column-right {
  width: 30%;
  float: left;
  padding-right: 3%;
}

.dropdown-panel {
  display: none;
  background-color: #fff;
  border: solid 1px #c6c4b8;
  position: absolute;
  z-index: 199;
  -webkit-border-radius: 3px;
  -moz-border-radius: 3px;
  -ms-border-radius: 3px;
  -o-border-radius: 3px;
  border-radius: 3px;
  -webkit-box-shadow: 0 1px 2px #ccc;
  -moz-box-shadow: 0 1px 2px #ccc;
  box-shadow: 0 1px 2px #ccc;
}

#book-chapters a.dropdown-trigger {
  padding: 1px;
  float: left;
}

#book-chapters a.right-home {
  float: right;
}

#book-chapters a.active {
  position: relative;
  z-index: 200;
  background-color: #fff !important;
  -moz-border-radius-topleft: 3px;
  -webkit-border-top-left-radius: 3px;
  -ms-border-top-left-radius: 3px;
  -o-border-top-left-radius: 3px;
  border-top-left-radius: 3px;
  -moz-border-radius-topright: 3px;
  -webkit-border-top-right-radius: 3px;
  -ms-border-top-right-radius: 3px;
  -o-border-top-right-radius: 3px;
  border-top-right-radius: 3px;
  border: solid 1px #c6c4b8;
  border-bottom: none;
}

.bottom-nav {
  text-align: center;
  background-color: #ebe9e1;
  background-color: rgba(223,221,213,0.33);
  -webkit-border-radius: 3px;
  -moz-border-radius: 3px;
  -ms-border-radius: 3px;
  -o-border-radius: 3px;
  border-radius: 3px;
  padding: 8px 12px 6px 12px;
  margin-bottom: 10px;
  font-size: 13px;
  font-weight: bold;
}

.bottom-nav .next{
    float: right;
}

.bottom-nav .prev {
    float: left;
}
